Whos stronger ?allen(D.gray)or Nero(DMC4)?!

Question: Allen Walker
(Main Character in the Anime,D.grayman)
or
Nero in the game, Devil may cry 4 ?

Answers: Allen Walker
(Main Character in the Anime,D.grayman)
or
Nero in the game, Devil may cry 4 ?

i think they both are the same >_>

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